ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

ECN Shout Chat
Top Posters(30 Days)
Admin 16
Recent Posts
fuse rejectors
by gfretwell. 03/23/17 01:12 PM
Another Forum Update
by Admin. 03/22/17 03:04 PM
Dining room plugs
by watersparkfalls. 03/21/17 10:31 PM
TRUE POWER
by jraef. 03/21/17 09:13 PM
WEG CFW-11 Frequency Inverter
by jraef. 03/21/17 08:50 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,245 Are you busy
165,957 Re: Forum
160,481 Need opinion
Who's Online Now
0 registered members (), 57 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#207009 - 09/13/12 06:09 PM ESR Meter  
KJay  Offline
Member
Joined: Nov 2007
Posts: 763
MA, USA
When you need to check capacitors on a pcb do you use an ESR meter that can test with them in the circuit or do you lift one leg or even remove them completely to do your tests. I have been contemplating maybe getting an ESR meter, but not really sure how consistently accurate they are when doing tests with the caps still in place on the board.

TKX


Study Guides for VDV / Structured Cabling Installers

Voice, Data, Video, (VDV) Fiber Optics, Communications, Low Voltage,
Fire Alarm, Electronic Security Systems Installations & Related

NTC Low Voltage Training & NICET Exam Study Guides
Low Voltage Training & NICET Exam Study Guides


#207011 - 09/14/12 02:52 AM Re: ESR Meter [Re: KJay]  
JoeTestingEngr  Offline
Member
Joined: Nov 2005
Posts: 782
Chicago, Il.
I have seen and changed dozens of open electrolytics and probably a few shorted ones. I don't think I've ever even conceived of trying to measure the ESR or ESL of one. Wouldn't that be a physical property, unlikely to change unless the cap has sustained visible damage. The puffed up caps on Dell motherboards probably have the same ESR as the normal ones. I do check for leakage though.
Joe


#207028 - 09/16/12 04:57 PM Re: ESR Meter [Re: JoeTestingEngr]  
KJay  Offline
Member
Joined: Nov 2007
Posts: 763
MA, USA
I'm not exactly sure yet how these differ from a standard stand-alone cap tester or multimeter with cap test function. Seems the better models of these things are generally a little too pricy for me right now, but I found a cheap ESR made by Blue that I may look into getting later on.




Member Spotlight
AllClear
AllClear
Belmond Iowa US
Posts: 44
Joined: August 2005
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.014s Queries: 15 (0.003s) Memory: 0.7529 MB (Peak: 0.8788 MB) Zlib enabled. Server Time: 2017-03-23 22:11:23 UTC